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MediumElastic detection rulesElastic

Disabling Windows Defender Security Settings via PowerShell

Identifies use of the Set-MpPreference or Add-MpPreference PowerShell commands to disable or weaken certain Windows Defender settings, including detection of base64-encoded variants used to bypass command-line…

Description

Identifies use of the Set-MpPreference or Add-MpPreference PowerShell commands to disable or weaken certain Windows Defender settings, including detection of base64-encoded variants used to bypass command-line inspection.

Detection logic

Its licence does not clear it for publishing here

Sunturai publishes a detection's own text where the licence it arrived under has been reviewed and permits it, and Elastic License 2.0 has not. The query as its source wrote it, its canonical form and the hash that pins this revision are in the workspace record.

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Detection requirements

Platform
ContainersESXiIaaSIdentity ProviderLinuxmacOSNetwork DevicesOffice SuiteSaaSWindows

The rule states no platform. This is derived from the 2 ATT&CK techniques it maps to.

Log source category
event_index

Known benign triggers

  • Planned Windows Defender configuration changes.

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